The motherboard is MSI model : G31TM-P21.
It has got realtek r8169 module on it. Used to net boot out of the box when I had snapshot 23333. The system died for no reason after update && upgrade. So I changed my hard drive, and installed 23559. the installation went fine except few problems. but the net boot never worked. I tried a Lot, and perhaps you are right, I thought r8168 is not enough , so I followed the wiki that says to hack r8169. That route is scary, and I was stuck in between where there is something to create the patch. Who ever wrote that wiki,,
My questions is,, those commands need sudo or not ?
some times the command "make" is recommaned without sudo and sometimes it needs. So I am damm confused. On top of it. There is no information to revert the changes if the issue is not resolved.